markz
100 TW
I edited the title from
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The Question
Normal non cc/cv PSU with a normal cc/cv charger to increase volts and still get cc/cv?
We all know multiple normal cc/cv chargers in series to increase voltage will work.
Have to check to see if the grounds are isolated for safety.
In my haste to post, and search on ground isolating I found this.
https://endless-sphere.com/forums/viewtopic.php?f=14&t=28912&p=416650&hilit=isolate+ground#p416650
Is that a typo?
Interesting and Good
Quote from above link
more is said
https://endless-sphere.com/forums/viewtopic.php?f=14&t=27199&hilit=psu#p393104
Meanwell supplies, depending on the one you get, current limit by foldback. Meaning, They won't let the current go over a certain point, and if it does, it will drop the voltage until the current reduces.
https://endless-sphere.com/forums/viewtopic.php?f=14&t=27199&hilit=psu#p393212
*********Note that the Mean Well SE models change below 450W and above. Below is cc/cv, above is not.
on the added current limiting boards, I made one!
Normal non cc/cv PSU with a normal cc/cv charger to increase volts and still get cc/cv charge to battery
---------------------------------------
The Question
Normal non cc/cv PSU with a normal cc/cv charger to increase volts and still get cc/cv?
We all know multiple normal cc/cv chargers in series to increase voltage will work.
Have to check to see if the grounds are isolated for safety.
In my haste to post, and search on ground isolating I found this.
https://endless-sphere.com/forums/viewtopic.php?f=14&t=28912&p=416650&hilit=isolate+ground#p416650
For 18s charging to 76v three 20v laptop chargers and 1 15v power supply will give you 75v=4.16v per cell
Is that a typo?
Interesting and Good
Quote from above link
Alot of you want to bulk charge quickly or at work but yet you want high cycle life. Laptop bricks are alot easier to deal with and not prone to vibration damage like meanwells. As long as they have decent passive cooling they work great as chargers. They can be found on ebay for a few dollars plus shipping. Most should be isolated. With a little plug work you can parallell the inputs and series the outputs for a nice charger on the go. If anyone else wants to chip in and add two cents then feel free.
It's usually pretty easy to isolate them. The simplest way would be to snip the ground pin off the power plug on two of the three chargers. The remaining ground pin will provide the needed safety ground.
Dell supplies tend to have an overload protection.
Do not use wall warts or transformers.
For 12s charging to 50v two 19v laptop chargers and 1 12v laptop supply gives you 50v=4.16v per cell
For 18s charging to 76v three 20v laptop chargers and 1 15v power supply will give you 75v=4.16v per cell
For 10s charging to 41v one 19.5v laptop charger and 1 22v laptop charger will give you 41.5v=4.15 per cell
Thats why I dont like the dells. I was using 4 fujitsu 16v bricks. That current limited at around 4.5A. The current limiting was built in. Somehow I think the dell communicates with the battery or something cause i could never put a load on it. It would always drop out.
more is said
they will shut down if overloaded a good thing, if they shut down simply turn them off for 10 seconds or so. Reset the pots installed between + and - wiper to the sense line and restart.
They are not CC or current limiting you have frequently readjust the pot during the charge, due to the battery volts going up
fletchers ideas on CC control with mean-wells
https://endless-sphere.com/forums/viewtopic.php?f=14&t=27199&hilit=psu#p393104
I think the issue is that the meanwell supply tries to charge the pack as fast as it can, and because it's a low resistance load, the power supply overloads trying to charge the battery, and eventually smokes. I think the tppacks circuit tries to prevent this by doing some throttling.
Meanwell supplies, depending on the one you get, current limit by foldback. Meaning, They won't let the current go over a certain point, and if it does, it will drop the voltage until the current reduces.
Meanwell supplies, depending on the one you get, current limit by foldback. Meaning, They won't let the current go over a certain point, and if it does, it will drop the voltage until the current reduces.
https://endless-sphere.com/forums/viewtopic.php?f=14&t=27199&hilit=psu#p393212
YES Meanwells can be used as a charger
As for the more specific question contained in the body of the post..... not sure if I have seen that particular model mentioned, but if the voltage adjustment is anything similar to the S and SE series, then it could be possible to modify the charger to operate over a greater range than indicated in the page you linked to. and at 1500 Watt I woul dliek one too
*********Note that the Mean Well SE models change below 450W and above. Below is cc/cv, above is not.
As long as the voltage control sense system is the same as the S and SE series,t ehn I see no reaason why the tppacks board would not work to contro it,
on the added current limiting boards, I made one!
I thought the current limiting boards were more for charging at a reasonable rate to prevent damage to the pack?
edit - WRONG
the current limiting is too protect the power supply